{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{3}{c}}
\toprule
                    &\multicolumn{1}{c}{Large}&\multicolumn{1}{c}{Small}&\multicolumn{1}{c}{All}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   \\
\midrule
Post $\times$ Treat &       0.292***&       0.125***&       0.127***\\
                    &     (0.031)   &     (0.028)   &     (0.028)   \\
\midrule
Control, Pre Mean   &        0.71   &        0.95   &        0.94   \\
R2                  &        0.35   &        0.22   &        0.22   \\
N (millions)                   &        0.40   &       12.44   &       12.84   \\
\bottomrule
\end{tabular}
}
